pub fn parse_powder_sweep(s: &str) -> Result<Vec<f64>, String>Expand description
Parse a --sweep START:END:STEP temperature range (display units) for the
powder command — ONE parser shared by the native CLI and WASM so their
validation cannot drift. Returns the
inclusive row temperatures. Guarded: STEP must be positive, END >= START, and the
row count is capped so a typo can’t emit an unbounded table.